The average speed of the runner is 0.25 km/min and this can be determined by using the formula of the speed.
Given :
A cross-country runner runs 10 km in 40 minutes.
The following steps can be used in order to determine the average speed:
Step 1 - The formula of speed can be used in order to determine the average speed.
Step 2 - The formula of speed is given below:
[tex]\rm s = \dfrac{D}{t}[/tex]
where D is the distance and t is time.
Step 3 - According to the given data, a cross-country runner runs 10 km in 40 minutes.
Step 4 - Substitute the values of the known terms in the above formula of speed.
[tex]\rm s = \dfrac{10}{40}[/tex]
Step 5 - Simplify the above expression.
s = 0.25 km/min
For more information, refer to the link given below:
https://brainly.com/question/7359669
